Cooler box



FIG. 1 is a top, rear, left side perspective view showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The lightened portions of the cooler box shown in FIGS. 1-7 illustrate environment and form no part of the claimed design. 

CLAIM The ornamental design for a cooler box, as shown and described. 